Stamp



FIG. 1 is an upper-right front perspective view of a stamp, showing our new design;

FIG. 2 is an upper-left rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a cross-sectional view thereof, taken in the direction of line 9-9 in FIG. 3.

The broken lines in the drawings illustrate portions of the stamp that form no part of the claimed design. 

CLAIM The ornamental design for a stamp, as shown and described. 